#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>

int main(int argc, char *argv[]){
	pid_t childpid = 0;
	int i, n;

	if (argc !=2 ){
		fprintf(stderr,"Usage: %s processes\n",argv[0]);
		return 1;
	}
	n = atoi(argv[1]);
	for(i = 1; i < n ; i++ ){
		if(childpid = fork() )
			break;
	}

        
	fprintf(stderr,"i:%d process ID:%ld parent ID:%d child ID:%ld\n",i, (long)getpid(),(long)getppid(),(long)childpid);
	return 0;
}
